Police investigating the death of Christopher Kelly, a former top fundraiser for ex- Gov. Rod Blagojevich, interviewed Kelly's girlfriend Monday as more details emerged about their relationship and Kelly's final hours.

Country Club Hills Police Chief Regina Evans met with Clarissa Flores-Buhelos at her attorney's Chicago office and afterward would only say Flores-Buhelos was "cooperating, but the investigation continues."

Kelly, 51, who was facing heavy pressure by Blagojevich prosecutors to cooperate in the corruption case against his former close friend, died Saturday morning just hours after authorities say Flores-Buhelos brought him to a suburban hospital with signs of a drug overdose.

On Monday, sources filled in some of the gaps in the events surrounding Kelly's arrival at Oak Forest Hospital shortly after 11 p.m. Friday and his transfer early Saturday to Stroger Hospital in Chicago, where he was pronounced dead hours later.

Flores-Buhelos brought Kelly into Oak Forest in a wheelchair, sources said. Sometime later he became very combative and had to be restrained. During this time, the sources said, Kelly made a reference to having taken a large amount of painkillers.

Hospital officials declined to comment about what happened at Oak Forest, citing federal health privacy laws. But the sources said Kelly eventually calmed down, was stabilized and that a treating physician at Oak Forest traveled with Kelly by private ambulance to Stroger Hospital so he could receive a higher level of care.

An autopsy was inconclusive, and toxicology tests are pending. Police have said Tylenol wrappers and a large container of pills were found in Kelly's SUV.

Kelly had pleaded guilty last week to tax and mail fraud charges in a kickback scheme at O'Hare International Airport and was scheduled to report to prison this week. As part of the federal investigation, authorities were looking at money Kelly gave Flores-Buhelos as an investment for a Logan Square nightclub, according to a source with knowledge of the situation.

The source said that Kelly recently went to the nightclub at 2047 N. Milwaukee Ave. and wanted to check on the club's financial books. A club owner, though, refused to allow Kelly to see the books, angering Kelly. The two allegedly exchanged words, the source said.

In the course of following up on Kelly and his finances, the FBI recently went to the club and asked about it. It was at that time that the owner repeated the story and said Kelly had threatened the owner, the source said.

That information sheds more light on happenings in federal court last week, the last time Kelly appeared at the Dirksen U.S. Courthouse. There, federal prosecutors moved to ensure Kelly was not allowed to visit the club or have contact with three individuals.

Norma Martinez, a representative of Aragon Entertainment Center and the nightclub, said last week that Kelly had an altercation at the club with another co-owner, whom she declined to identify. She said Kelly had no ownership in the club.

On Monday, an attorney for the club, Carlos Vazquez, said Flores-Buhelos worked in a non-managerial position "for a month or so" in the club's first-floor restaurant.

On Monday, meanwhile, Country Club Hills Mayor Dwight Welch said investigators were prepared to hold news conference Tuesday to release details and a timeline of Kelly's death.

People following Kelly's shocking death would be both "pleased and a little surprised" by police's findings, Welch said, declining to elaborate.

Welch had previously identified Flores-Buhelos as Kelly's girlfriend and accused her of having "lawyered up" and not cooperating with police. Her attorney, Terry Gillespie, angrily responded by calling Welch's comments "unconscionable grandstanding." The police chief met with Flores-Buhelos at Gillespie's office; the attorney declined to comment afterward.

Earlier, Welch said police were seeking the cell phones for both Kelly and Flores-Behelos because the two had been sending text messages back and forth before Flores-Buhelos found Kelly slumped over the wheel of his 2007 Cadillac Escalade in a lumberyard in Country Club Hills Friday night. He said the messages were key to piecing together the events leading to Kelly's death because Kelly told her he wanted to kill himself.

The mayor also said police were still seeking information from a gray-haired "mystery man" who unsuccessfully tried to pick up the Escalade from the hospital, keys in his hand. Hoping to identify the man, police reviewed surveillance tape from Oak Forest Hospital and found the tape "very revealing," Welch said.